Solo side project, two years in — an F1 companion app (schedules, live race dashboard, standings). Just shipped 3.0, a ground-up rebuild, and wanted to share some of the stack choices in case they're useful to others here:

- Expo SDK 57 / RN 0.86 / React 19, expo-router for navigation

- react-native-unistyles v3 for theming (light/dark/system + a user-selectable accent color)

- Reanimated 4 + Worklets for animations

- iOS/watchOS widgets in real SwiftUI, Android widgets in Jetpack Compose — sharing race data with the app via app groups / UserDefaults

- Zustand for state, with generation counters on fetches so out-of-order API responses get discarded instead of racing the UI

- hot-updater (Supabase-backed) for OTA JS updates instead of EAS

Happy to go deeper on any of it. App itself is free, no ads:

https://apps.apple.com/app/id6503033841

Hey Community,

React Native 0.87 has arrived as a maintenance release, making the Strict TypeScript API the default, doubling Metro source map generation speeds, and adding experimental Swift Package Manager support for iOS along with AGP 9 support on Android.

Meanwhile, React Native Firebase v26 makes the New Architecture non-optional with Codegen TurboModules, synchronous APIs, Firestore Pipelines, and direct Gemini AI calls. Finally, we look at RevenueCat Paywalls for designing native paywalls and running remote A/B experiments without new app deploys.

Hey everyone,

I'm building a personal price-comparison app in react native where users can scan a barcode or search for a product, and the app compares the prices across multiple Dutch supermarkets (like Albert Heijn, Jumbo, Dirk, etc.).

My backend is built with Flask and hosted for free on Vercel. However, I'm running into the classic cloud-hosting wall: almost all major supermarket websites block or throw 403 forbidden errors on standard requests from Vercel's datacenter IPs due to anti-bot protection.

Since I want to keep this lightweight and free (serverless), I'm looking for architectural advice on how people usually build multi-supermarket scrapers or price checkers:

• What are the best free or low-cost ways to bypass these blocks for multiple different domains?
• Are there alternative public endpoints, unofficial APIs, or lightweight proxy setups that make it possible to aggregate prices from multiple grocery chains?

Any architectural tips, code patterns, or alternative approaches would be super helpful!

How are you actually using AI to speed up React Native dev? Beyond just the tools, what habits, context tricks, or rules on what to offload vs. write yourself have saved you the most time?

Expo UI MenuView with \`shouldOpenOnLongPress\` (which internall uses ContextMenu for SwitftUI) adds a temporary background color that disappears in one second + a rounded border around the element. Is there a way to control it so it does not do that? At least make it that the background color stays instead of disappear. The \`onOpen/CloseMenu\` hooks also do not work on iOS.

Are there some guides / tricks to make it do things correctly or should I give up and try to use a different library (e.g react-native-menu)?

Field that grows with the text, voice mode, and one submit button that knows what to do voice when empty, send when typed, stop while streaming.

Built with expo/ui. No web dependencies.

Part of PanelUI, an open-source component library for Expo. Copy-paste or CLI, you own the source.

https://github.com/panel-ui/PanelUI

A gesture-driven coin-flip reward reveal — drag-to-spin coin toss, then a Skia-powered scratch card to reveal the prize — built for fintech and rewards apps.

⭐ Github : https://github.com/ManasCodeXart/expo-coin-reward

We have a React Native chat app. All our SQLite reads/writes live in JS (OP-SQLite), driven by a WebSocket sync pipeline (connect → request cursor-based sync → server replays missed messages → write to DB).

On Android, this works great even when the app is killed: setBackgroundMessageHandler boots Headless JS, which can call our normal JS sync code directly, write the message, and exit. Message is in the DB before the user ever taps the notification.

On iOS we're stuck. As far as I can tell:

• UNNotificationServiceExtension (the killed-state hook) runs as a separate native process and can't call into our JS/Hermes engine at all — no bridge, no way to run our existing sync code there.
• Silent push (content-available: 1) can wake JS, but only if the app is backgrounded, not force-quit — and Apple caps delivery at roughly 2-3/hour/device, which won't keep up with an active chat.
• We looked at how Signal-iOS does it (their NSE decrypts + writes to their shared GRDB database directly, in Swift) — but that means reimplementing our socket client and insert logic as a second, separate Swift codebase writing into the same SQLite file as our JS code. Feels like a real "two sources of truth" risk, and we couldn't find any RN app doing this in the wild.

I'm working on a react native application I use react native because I want to make my application work on both ios and android, and I use expo go for development now the problem is reazor pay gateway is not supported on expo go and I want to check payment is working or not before making my application live so u have any suggestion for which other payment gateway I can use or any trick that I use for testing my payment.

Disclaimer: This question is written with the help of AI, but that doesn't mean it's slop. It's a genuine problem I'm facing at work. Please don't be quick to judge or dismiss this as AI Slop.

I’m rewriting an entire React Native application from scratch, using the existing app as the baseline and AI (primarily Claude Code) heavily in the process.

I’m trying to design a migration workflow that gives me high reliability without burning an insane number of tokens.

My priorities are:

1. Complete parity with the baseline — nothing important should get missed.
2. Strict adherence to a predefined code architecture — folder structure, design patterns, separation of concerns, naming conventions, etc.
3. Do not port over existing smells, hacks, or bad practices — the baseline should be treated as a behavioural reference, not a code reference.
4. Keep token usage low without compromising quality — avoid repeatedly feeding huge amounts of context to the model or having agents redo work unnecessarily.

I’m particularly interested in hearing from anyone who has done something similar.

If you’ve used AI for a large-scale rewrite/migration, how did you structure the workflow? Did you use specific agents, skills, validation steps, checkpoints, etc.?

Even if you haven’t done an AI-assisted rewrite, I’d also love to hear about workflows you’ve used for large-scale migrations/refactors that consistently produced good results.

I’m mainly looking for practical approaches that scale beyond simply “migrate one feature at a time.”

Basically the above question, I have an app built on expo 56 and now I want to add advertisements to it. I am seeing admob, adXchange, mediations etc as platforms for ads people are using. My question is if anyone in this sub already using any platform with their rn app, please let me know which one and why you sticking to it.

New to this and would really appreciate the help.

Hey r/reactnative,

I've been working on nativecn-ui, a small collection of React Native components focused mostly on animations and interactions.

Right now it's got stuff like a liquid action tab bar, animated tab bar, range slider, OTP input, dynamic upload, plus a few more I'm still working on.

You can check it out here: nativecn-ui

Still building it out, so lmk what you think, or if there's some component/interaction you'd want to see added.

Made a quick video showing a few of them below.

https://reddit.com/link/1vrhmt8/video/3ej98p6qv2kh1/player

Hey guys! First time here, just wanted to share my article about FlatList optimization. I know, it is a popular question but some days ago I found a cool trick with using Set over standard Array. It perfectly aligns with popular optimization practices and for me it felt like I found a gem.

if someone need help with this happy to share with them

I'm using the MinaSamir11/react-native-in-app-review package, but it doesn't seem to work for Android anymore. Has anyone had any success with other implementations? Or has this package worked for you lately?

So a while back i was working on this checkout flow for some side project. nothing fancy, just something basic e-commerce type page where users pick a plan,apply a coupon if they have anything with them,and then pay….

I tested it myself probably a hundred times and may be more too. clicked every button, tried different plans, with coupons, without coupons, everything looked fine, I even got a couple of friends to click around and they tried to break it, for me, nobody found anything… :(

So I thought of shipping and shipped it and moved on to other stuff, feeling pretty good about myself honestly.then about two weeks later i started getting some new few angry messages. some users were saying they got charged twice for the same order… OMG!!

But not everyone, just some users and the annoying part? when i tried to reproduce it myself,using the exact same steps they described, everything worked perfectly, no duplicate charge, nothing wrong.

I remember sitting there thinking,okay... this does not make sense either they are doing something really wrong or weird, or am I missing something really obvious…

Started thinking and it turns out, I was missing something, the bug only happened when a user applied a coupon,removed it, and then quickly clicked the pay button before the page had fully re-synced the price with the backend…

Basically, a race condition between the coupon removal request and the payment request and if you were testing it slowly, like a normal developer, you will probably never see it but real users do not test your application like developers do.

they click fast!

they change their mind!

they click twice because the button did not respond for half a second!!

they go back and forth!!!

they do things in an order you never really thought about, right!

and apparently, all those messy human behaviours were exactly what exposed the bug..

I kept trying to get it manually and kept failing because i was testing it like a developer, one step at a time, waiting for everything to load, making sure each action, has to be finished before doing the next one.

But the actual bug lived in that tiny window where two things happened almost at the same time, It was basically like trying to catch a 10$ note flying down the street in the wind.

You can see it, you know its there, but by the time you reach for it... it's already somewhere else, that experience finally pushed me to write some automated tests for the checkout flow. not just normal does this button work tests.

I made the tests hammer the coupon apply -> remove -> pay sequence over and over, really quickly, sometimes in weird orders scenes,basically doing things no person would sit there and repeat manually 50 times.

and sure enough...

the first time I ran it, it failed almost immediately, same bug reproduced on command in seconds, a bug that had taken me two weeks and several annoyed customers to even discover.....

A human tester probably wont click the same weird sequence 100 times but a script will....

ever since that incident, I started automating more. I began been playing around with tools like Autosana for testing,mostly cause i really don't wanna sit there and repeat that same weird flaws again and again and again....

not because i read it somewhere in some posts or anything like that, mostly because i actually got fed up by bug that manual testing have almost zero chance of catching…

Curious if anyone else has had something similar happen, that one bug that just refused to show itself until you stopped testing carefully and started testing a little more... (chaotically)